FCC ID: 2AUU8-BB2713 Video speaker

microphone manual Video speaker Test Model: BB2713 SHENZHEN PROTEK ELECTRONIC CO.,LIMITED Address :

5/F, Building C15, Fuyuan Industrial City, NO.598 Zhoushi Road, Jiuwei Community, Hangcheng Street, Baoan District, Shenzhen City, Guangdong Province, P.R.China working principle The transmitting module KT0622 collects the sound source and converts the analog signal into a digital signal through analog to digital conversion. RF radio frequency radiates digital signals into the air to form electrical waves. In order to obtain a longer transmission distance, the electromagnetic wave signal can be amplified by PA and finally passed through the antenna Launch out. The receiving module antenna receives the electromagnetic waves emitted by the transmitting module, and the amplified signal is converted into a digital signal by RF through the PA, and also passed through the MCU.The processing is finally converted to analog signals through digital to analog signals and transmitted through the speakers. TX KT0622 MCU 24C02 switch POWER MIC 24MHz RX KT0612 speaker 24MHz MCU 24C02 POWER Modulation FM Frequency ranges 202.75MHz Switching bandwidth 202.75MHz FR Sensitivity 80dB 80dB 2 202.75MHz 2 FM 2 Dimensions approx. 240x49 mm Weight approx. 168g Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment.

SHENZHEN LCS COMPLIANCE TESTING LABORATORY LTD. FCC ID: 2AUU8-BB2713 LABEL AND LOCATION FCC ID: 2AUU8-BB2713 This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Size: L4.0cm*W3.0cm Label Location This report shall not be reproduced except in full, without the written approval of Shenzhen LCS Compliance Testing Laboratory Ltd. Page 1 of 1

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046

<2019-11-19>

TO WHOM IT MAY CONCERN Pursuant to Paragraphs 0.457 and 0.459 of the Commissions Rules (47 C.F.R.) and Section 552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products:

FCC ID 2AUU8-BB2713 For the product stated above, we request that the following information be held confidential;

Model name BB2713 Exhibits Long-Term Short-Term Short-Term Confidentiality Confidentiality Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos Users Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely,

(Signed) Name / Title: Shrek Zhu / General Manager Company: SHENZHEN PROTEK ELECTRONIC CO.,LIMITED Address: 5/F, Building C15, Fuyuan Industrial City, NO.598 Zhoushi Road, Jiuwei Community, Hangcheng Street, Baoan District, Shenzhen City, Guangdong Province, P.R.China Phone: 86-0755-27788176 Fax: 86-0755-27788176 E-Mail: shrek@protek-elec.com